Eastham is a town in Barnstable County, Massachusetts, United States, Barnstable County being coextensive with Cape Cod. The population was 4,956 at the 2010 census.[1]
For geographic and demographic information about the village of North Eastham, please see North Eastham, Massachusetts.

Originally settled by the Nauset tribe, Eastham was the site where in 1620 a hunting expedition landed, comprised from the crew of the sailing vessel Mayflower, which had stopped in Provincetown harbor on Cape Cod Bay after a rough crossing of the Atlantic Ocean, which led to the first encounter of the Pilgrims and the local Nauset people at First Encounter Beach. The area would not be settled by Europeans, however, until 1644. The original lands included what are now the towns of Truro, Wellfleet, Eastham, Orleans and a small portion of Chatham. Eastham town was officially incorporated in 1651.

Today, Eastham is mostly known as the "Gate" to the Cape Cod National Seashore, which was founded in 1961 by President John F. Kennedy to protect Cape Cod's coast from erosion and overpopulation. The town is the site of many beaches, both on the Atlantic and bay sides, as well as the Nauset Light, which was moved to the town in 1923 from its old location in Chatham, and the Three Sisters Lighthouses, which have since been moved away from their now-eroded perches on the coast to a field just west of Nauset Light.[2].